Amino-mercapto functional organopolysiloxanes
View Patent ↗An organopolysiloxane containing both an amino functional organic group and a mercapto functional organic group is disclosed. A method of making such amino-mercapto functional organopolysiloxanes is by reacting (A) a silanol-functional polysiloxane, (B) an amino functional alkoxy silane, and (C) a mercapto functional alkoxy silane, via a condensation reaction. The amino-mercapto functional organopolysiloxanes products are useful in textile and fabric treatments.
1. A process for the preparation of an amino-mercapto functional polysiloxane consisting of reacting:
(A) 1 to 80 mol % of a silanol-functional polysiloxane,
(B) 10 to 60 mol % of an amino functional alkoxy silane, and
(C) 10 to 60 mol % of a mercapto functional alkoxy silane,
where (A)+(B)+(C) sums to 100%, and optionally
(D) an alcohol or monoalkoxysilane,
via a condensation reaction.
2. The process of claim 1 wherein the silanol functional polysiloxane is a polydiorganosiloxane having the general formula;
HO—[R 2 SiO] a —H
where R is independently a monovalent organic group and a is 1-4000.
3. The process of claim 1 wherein the amino functional alkoxy silane has the formula
R 3 h R N i Si(OR 4 ) [4-(h+i)]
where
h is 0, 1 or 2, i is 1 or 2, with the proviso that (h+i)≦3,
R N is an amino functional organic group,
R 3 is a hydrocarbon group containing 1 to 30 carbon atoms,
R 4 is an alkyl group containing 1-20 carbon atoms.
4. The process of claim 1 wherein the amino functional alkoxy silane is selected from;
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 3 NH 2 ,
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 4 NH 2 ,
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 3 NH(CH 2 ) 2 NH 2 ,
(CH 3 O) 2 (CH 3 )SiCH 2 CH(CH 3 )CH 2 NH(CH 2 ) 2 NH 2 ,
(CH 3 O) 2 (CH 3 )SiCH 2 CH(CH 3 )CH 2 NH(CH 2 ) 3 NH 2 ,
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 3 NH(CH 2 ) 2 NH(CH 2 ) 2 NH 2 ,
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 3 NH(CH 2 ) 4 NH 2 , or
(CH 3 O) 2 (CH 3 )Si(CH 2 ) 3 —O—(CH 2 ) 2 NH 2 .
5. The process of claim 1 wherein the mercapto functional alkoxy silane has the formula;
R 3 h R S i Si(OR 4 ) [4-(h+i)]
where
h is 0, 1 or 2, i is 1 or 2, with the proviso that (h+i)≦3,
R S is a mercapto functional organic group,
R 3 is a hydrocarbon group containing 1 to 30 carbon atoms,
R 4 is an alkyl group containing 1-20 carbon atoms.
6. The process of claim 1 wherein the mercapto functional silane is selected from
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH(CH 3 )SH,
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH 2 CH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH 2 CH 2 CH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 2 (CH 3 )SiCH 2 CH 2 SCH 3
(C 2 H 5 O) 3 SiCH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 3 SiCH 2 CH(CH 3 )SH,
(C 2 H 5 O) 3 SiCH 2 CH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 3 SiCH 2 CH 2 CH 2 CH 2 CH 2 SH,
(C 2 H 5 O) 3 SiCH 2 CH 2 CH 2 CH 2 CH 2 CH 2 SH, or
(C 2 H 5 O) 3 SiCH 2 CH 2 SCH 3 .